Is It Our Obligation to Not Invade a Country?

There are so many examples of indian invasions in other lands. And is it our obligation to not invade a country in the future? No. When you have just causes for war, then war is justifiable. I am by no means a war monger. I would love nothing more than global peace and bichara wasoeva kotumbacam and all that thing. Butt that's not how the world works. So that's what what i have to say about this animish says.